This article presents laboratory scale models developed to study the per-
formance of grounding systems in uniform soil. Two parallel grids are investigated
and correlated with a same mass grid having the same conductormaterial and extend-
ing over the same area at a depth equal to that of the upper grid. The experimental
results demonstrate how the potential profiles and ground resistance are influenced by
the grounding grid design such as number of meshes, grid depth and spacing between
parallel grids. The effectiveness of the two parallel grids is compared with that of
the upper grid only. The measured surface potential and ground resistance agreed
satisfactorily with the present calculated values